/****************************************************************************
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** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
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** This file is part of the Qt Compositor.
**
** $QT_BEGIN_LICENSE:BSD$
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**
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** modification, are permitted provided that the following conditions are
** met:
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**     notice, this list of conditions and the following disclaimer.
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**     notice, this list of conditions and the following disclaimer in
**     the documentation and/or other materials provided with the
**     distribution.
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****************************************************************************/

#ifndef WAYLAND_OBJECT_H
#define WAYLAND_OBJECT_H

#include <wayland-server.h>

#include <string.h>

namespace Wayland {

template <typename T>
class Object : public T
{
public:
    typedef T Base;

    Object() { memset(this, 0, sizeof(T)); }

    const T *base() const { return this; }
    T *base() { return this; }

    template <typename Implementation>
    void addClientResource(wl_client *client,
                           wl_resource *resource,
                           int id, const struct wl_interface *interface,
                           Implementation implementation,
                           void (*destroy)(struct wl_resource *resource))
    {
        resource->object.id = id;
        resource->object.interface = interface;
        resource->object.implementation = (void (**)(void))implementation;
        resource->data = this;
        resource->destroy = destroy;

        wl_client_add_resource(client, resource);
    }
};

template <typename T>
T *resolve(wl_resource *from)
{
    Object<typename T::Base> *object = reinterpret_cast<Object<typename T::Base> *>(from->data);
    return static_cast<T *>(object);
}

template <typename T>
T *wayland_cast(typename T::Base *from)
{
    Object<typename T::Base> *object = reinterpret_cast<Object<typename T::Base> *>(from);
    return static_cast<T *>(object);
}

}

#endif //WAYLAND_OBJECT_H
